Managing an Internet outage
Pedro Espinoza
raindoctor at gmail.com
Mon May 12 15:07:51 UTC 2008
Reduce TTL to 5 mins or so, the way Akamai does. Then have some
rudimentary heart beat mechanism; whenever the node goes down, update
the A or CNAME record.
> >>> We occasionally have a situation where our Internet access is completely
> >>> down. My Manager has asked about the viability of locating a DNS server
> >>> off site, and during a situation when we're down, modifying it so that
> >> it
> >>> resolves my entire domain to a single IP address. Web users would be
> >>> redirected to that address, and a web page would explain we're off line.
> >>>
> >>> Our DNS TTL is set to 1 hour, however, I'm concerned that sites might
> >>> cache that address for longer than the TTL, and affect things such as
> >> mail
> >>> delivery beyond the outage. Does anyone have an opinion on this plan?
> >>> Obviously improving our redundancy is a better solution, and that will
> >>> come in time. Right now this seems like a quick and easy (dirty)
> >> solution.
> >>>
> >>> -Mike
> >>>
>
>
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